Alright, let's solve this math problem step by step. First, we have the number 725. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 18. So, we're going to take the number 725 and add it to itself 18 times.
Step 1: 0 + 725 = 725
Step 2: 725 + 725 = 1450
Step 3: 1450 + 725 = 2175
Step 4: 2175 + 725 = 2900
Step 5: 2900 + 725 = 3625
Step 6: 3625 + 725 = 4350
Step 7: 4350 + 725 = 5075
Step 8: 5075 + 725 = 5800
Step 9: 5800 + 725 = 6525
Step 10: 6525 + 725 = 7250
Step 11: 7250 + 725 = 7975
Step 12: 7975 + 725 = 8700
Step 13: 8700 + 725 = 9425
Step 14: 9425 + 725 = 10150
Step 15: 10150 + 725 = 10875
Step 16: 10875 + 725 = 11600
Step 17: 11600 + 725 = 12325
Step 18: 12325 + 725 = 13050

So, 725*18 = 13050